These permanently assembled bolts feature special washers with super-hardened serrated teeth that, when sufficiently torqued, the washers bite into and grab the bottom of the bolt head and the top surface of the header. After...

Classic Industries® stocks a full line of Hedman Hedders™ for 1964-79 Chevy II / Nova models. These headers are designed to replace the heavy and restrictive factory manifolds with tubular steel manifolds. Headers...

Classic Industries® stocks a full line of Hedman Hedders™ for 1964-79 Chevy II / Nova models. These headers are designed to replace the heavy and restrictive factory manifolds with tubular steel manifolds. Headers...

Reproduction exhaust manifolds for big block models. These extremely high-quality manifolds are designed and manufactured to exact original specifications including the correct casting numbers for 1968-70 models and are...

Correct reproduction of the original studs and nuts used to attach the exhaust pipes to exhaust manifold. Each set includes a complete set of studs for the installation of both exhaust manifolds. Includes 3 short studs, 3...

Classic Industries® stocks a full line of Hedman Hedders™ for 1955-94 Chevrolet Impala / full size models. These headers are designed to replace the heavy and restrictive factory manifolds with tubular steel...

Classic Industries® stocks a full line of Hedman Hedders™ for 1955-94 Chevrolet Impala / full size models. These headers are designed to replace the heavy and restrictive factory manifolds with tubular steel...

Classic Industries® stocks a full line of Hedman Hedders™. These headers are designed to replace the heavy and restrictive factory manifolds with tubular steel manifolds. Headers are not only lighter, but will also...

Every header is tuned with the proper tube size and length to efficiently remove all the exhaust from each cylinder, reducing pumping losses for dramatic gains in horsepower and torque. Doug?s headers are carefully...

Classic Industries® stocks a full line of Hedman Hedders™. These headers are designed to replace the heavy and restrictive factory manifolds with tubular steel manifolds. Headers are not only lighter, but will also...

Classic Industries® stocks a full line of Hedman Hedders™. These headers are designed to replace the heavy and restrictive factory manifolds with tubular steel manifolds. Headers are not only lighter, but will also...

These exhaust manifolds are based on the famous high performance small block Chevy Ram's Horn manifolds from the 1950's and 60's. Manufactured from heavy cast iron without air injection ports or alternator/generator bracket...

These exhaust manifolds are based on the famous high performance small block Chevy Ram's Horn manifolds from the 1950's and 60's. Manufactured from heavy cast iron without air injection ports or alternator/generator bracket...

These Hooker cast iron exhaust manifolds are designed to hug the engine block closely so they will work with a variety of LS engine swaps or as a replacement. Their contoured shape aims exhaust gases for increased flow and...

These Hooker cast iron exhaust manifolds are designed to hug the engine block closely so they will work with a variety of LS engine swaps or as a replacement. Their contoured shape aims exhaust gases for increased flow and...

These exhaust manifolds are based on the famous high performance small block Chevy Ram's Horn manifolds from the 1950's and 60's. Manufactured from heavy cast iron without air injection ports or alternator/generator bracket...

These Hooker cast iron exhaust manifolds are designed to hug the engine block closely so they will work with a variety of LS engine swaps or as a replacement. Their contoured shape aims exhaust gases for increased flow and...

These Hooker cast iron exhaust manifolds are designed to hug the engine block closely so they will work with a variety of LS engine swaps or as a replacement. Their contoured shape aims exhaust gases for increased flow and...

These exhaust manifolds are based on the famous high performance small block Chevy Ram's Horn manifolds from the 1950's and 60's. Manufactured from heavy cast iron without air injection ports or alternator/generator bracket...

These Hooker cast iron exhaust manifolds are designed to hug the engine block closely so they will work with a variety of LS engine swaps or as a replacement. Their contoured shape aims exhaust gases for increased flow and...

These Tri-Y design headers yield maximum power from off idle to 4500 RPM making them well suited for applications demanding maximum mid-range torque with maximum fuel economy. Every header is tuned with the proper tube size...

Every header is tuned with the proper tube size and length to efficiently remove all the exhaust from each cylinder, reducing pumping losses for dramatic gains in horsepower and torque. Doug?s headers are carefully...

Every header is tuned with the proper tube size and length to efficiently remove all the exhaust from each cylinder, reducing pumping losses for dramatic gains in horsepower and torque. Doug?s headers are carefully...